Pneumatic projectile



(No Model.)

W. T. CHAMBERLAIN.

PNEUMATIC PROTECTILE.

Patented Feb. 24, 1885.

ATTOR N EY.

, INVENTOR:

WITNESSES:

WILLIAM l T. CHAMBERLAIN, OF NORWICH, CONNECTICUT, ASSIGNOR OF TWO-THIRDS TO BENJAMIN M. PRINCE, OF SAME PLACE, AND WVILLIAM CROSSLEY, OF RANDOLPH, MASSACHUSETTS.

PNEQMATIC PROJ ECTI LE."

SPECIFICATION forming part of Letters Patent No. 312,972, dated February 24, 1885.

Application filed June 21, 1884. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM T. CHAMBER- LAIN, a citizen of the United States, residing at Norwich, in the county of New London,

State of Connecticut, have invented a new and useful Improvement in Projectiles, which improvement is fully set forth in the following specification and accompanying drawings, in Wl1i0h Figure 1 is a side elevationof a projectile embodying my invention. Fig. 2 is a longitudinal section thereof, showing the same in position. Fig. 3 is an end view thereof.

Similar lettersof reference indicate corre- I 5 sponding parts in the several figures.

. My invention consists of a projectile having a chamber for compressed air, an inlet and outlet for the air, a plate for closing said outlet, and means for holding said plate in position, the release of the same permitting the air to escape from its chamber, whereby the projectile is impelled, as willbe hereinafter set forth.

Referring to the drawings, A represents a projectile, which is formed with a suitable point, a, a chamber, 1), and an open base, 0. In the wall of the chamber Z) is an inlet, (1, and within said chamber is secured an inwardlyopening valve,c, for closing the inlet (Z when the chamber b is charged with air.

B represents a plate or disk, which is fitted against a shoulder, f, on the walls of the base of the projectile, so as to close said base, and located Within an annular flange, g, which projects rearward from the base. The flange 5 g is partly recessed on its back, as at h, and

formed with recesses k on its face, the ways being in communication with the recesses h, so that a cross-bar, G, employed for holding the closing-plate B in position, may be connected 0 with said flange 9, said bar carrying at its center a screw, D, which is adapted to tighten against the plate B, for holding the bar firmly against the flange, said bar, however, being removable whenrproperly struck. A recess, 5 7c, is also formed in the face of the flange, the same extending at an angle to the recesses k, and adapted to receive the firing-pin E of the fire-arm. The closing-plate B is fitted within the flange g, and the ends of the cross bar 0 are inserted in the recesses k,said bar 0 then being moved so that its ends occupy the recesses h, and as it is held tightlyin position it holds the plate B tightly against the shoulder f and securely closes the base a, and consequently the corresponding end of the cham- 5 ber Z). The projectile is now charged with air in any suitable manner, the air entering the chamber 1) through the inlet d, and when it is properly charged the valve f closes. The proj ectile is then introduced into the fire-arm, the recess k being above, so that the firing-pin E may be passed throughthe same and reach the cross-bar C.

When the firing-pin is struck, the bar 0 is forced toward the recesses 76, whereby it is re- 6 5 leased, and'as it no longer controls the closing-plate B the latter immediately moves rearward from its seat and the air is liberated, the reaction'of the same in the bore of the firearm at the base thereof forcibly impelling the projectile from the arm,the result being accomplished without smell, smoke, heat, and fouling tendency of powdencharged projectiles.

If desired, the projectile may be charged with explosive material, similar to a shell, for 7 which purpose a chamber, A, is formed in the shell in front of the air-chamber, as shown in Fig. 2, the explosive preferred being dynamite.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A projectile having a chamber for compressed air, an inlet in the wall thereof, a valve within the chamber for closing said inlet, a removable plate at the rear of said chamber for closing the same, and a removable bar connected with the base for holding said plate, said bar being controlled by the firing-pin of the firearm 0r weapon, the parts being-como bined and operating substantially as and for the purpose set forth.

2. An air-charged projectile having at the base of its air-chamber a closing-plate and a cross-bar for holding the same, said base being 9 5 provided with an annular face, which is recessed to receive the ends of said cross-bar, and secure the cross-bar, substantially as and for the purpose set forth.

a screw connected with the cross-bar tightening against the closing-plate, substantially as and for the purpose set forth. 8. An aincharged projectile having a cl0s- WVILLIAM T. CHAMBERLAIN. 5 ingplate at the base of its air-chamber, an Vitnesses:

annular flange projecting from said base, a 1 JOHN A. XVIEDERSHEIM, cross-bar fitted in recesses in said flange, and

A. P. GRANT. 

